{"id":494,"date":"2011-10-30T14:09:49","date_gmt":"2011-10-30T06:09:49","guid":{"rendered":"http:\/\/www.myvoipapp.com\/blogs\/yxh\/?p=494"},"modified":"2019-02-12T20:11:53","modified_gmt":"2019-02-12T12:11:53","slug":"rfc4028%e7%9a%84%e4%b8%8d%e8%b6%b3%e4%b8%8esip-keep-alive%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.myvoipapp.com\/blogs\/yxh\/2011\/10\/30\/rfc4028%e7%9a%84%e4%b8%8d%e8%b6%b3%e4%b8%8esip-keep-alive%e6%96%b9%e6%b3%95\/","title":{"rendered":"RFC4028\u7684\u4e0d\u8db3\u4e0eSIP keep-alive\u65b9\u6cd5"},"content":{"rendered":"<p>\u5728SIP\u65cf\u534f\u8bae\u4e2d\uff0c\u53ea\u6709RFC4028\u660e\u786e\u8ba8\u8bba\u4e86\u5bf9\u8bddkeep-alive\u95ee\u9898\u3002\u5b9e\u9645\u4e0a\u8fd9\u5728\u5de5\u7a0b\u5e94\u7528\u3001\u751f\u4ea7\u73af\u5883\u90e8\u7f72\u4e2d\uff0c\u662f\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u8bdd\u9898\uff0c\u5c24\u5176\u662fSIP\u57fa\u4e8eUDP\u534f\u8bae\u65f6\uff0c\u7f51\u7edc\u539f\u56e0\u4e22\u5305\u662f\u5f88\u5e38\u89c1\u7684\uff0c\u53e6\u5916\u8fd8\u6709\u8f6f\u7ec8\u7aef\u4efb\u610f\u9000\u51fa\u5bf9\u8bdd\u7b49\u60c5\u51b5\u3002\u7f3a\u4e4fkeep-alive\u4fdd\u62a4\u7684SIP\u670d\u52a1\u5668\u6beb\u65e0\u7591\u95ee\u5c06\u4f1a\u4e25\u91cd\u6d88\u8017\u8d44\u6e90\uff0c\u6700\u7ec8\u5bfc\u81f4\u6574\u4e2aserver\u88ab\u8feb\u9000\u51fa\u670d\u52a1\u3002<\/p>\n<p>RFC4028\u534f\u8bae\u8003\u8651\u5230\u6709\u72b6\u6001Proxy\u3001\u65e0\u72b6\u6001Proxy\u7b49\u60c5\u51b5\uff0c\u63d0\u51fa\u6269\u5c55Session-Expires\u4ee5\u53caMin-SE\u4e24\u4e2a\u65b0\u7684Header\uff0c\u5e76\u4e14\u901a\u8fc7reINVITE\u6d88\u606f\u6765keep-alive dialog\u3002\u57fa\u672c\u4e0a\uff0c\u8fd9\u4e2a\u534f\u8bae\u672c\u8eab\u6ca1\u6709\u592a\u591a\u95ee\u9898\uff0c\u6309\u7167\u5b83\u7684\u601d\u8def\uff0c\u7684\u786e\u662f\u53ef\u4ee5\u89e3\u51b3keep-alive\u7684\u95ee\u9898\uff0c\u4f46\u662f\u5728\u5b9e\u9645\u90e8\u7f72\u4e2d\uff0c\u8be5\u534f\u8bae\u672a\u5fc5\u53ef\u53d6\uff0c\u6709\u5f88\u5927\u7684\u7f3a\u9677\uff1a<\/p>\n<p>\uff081\uff09SIP\u8fd0\u8425\u5546\u53ef\u80fd\u4f1a\u62d2\u7eddreINVITE\u6d88\u606f\u3002\u5b9e\u9645\u4e0a\u5f88\u591aSIP\u8fd0\u8425\u5546\u4f1a\u62d2\u7eddreINVITE\u6d88\u606f\uff0c\u8fd9\u662f\u51fa\u4e8eSIP\u8fd0\u8425\u5546\u5a92\u4f53\u5904\u7406\u65b9\u9762\u7684\u8003\u8651\u3002\u6700\u521d\u5e94\u7528reINVITE\u5c31\u662f\u4e3a\u4e86\u4fee\u6539\u5a92\u4f53\u6d41\uff0c\u800c\u8fd9\u6beb\u65e0\u7591\u95ee\u4f1a\u5bfc\u81f4SIP\u8fd0\u8425\u5546\u5a92\u4f53\u670d\u52a1\u5668\u91cd\u65b0\u5206\u914d\u8d44\u6e90\u7b49\u60c5\u51b5\u51fa\u73b0\u3002RFC4028\u4e2d\u53ea\u662f\u5b9a\u4e49\u4e86\u65b0\u589eHeader\u548ccallFlow\uff0c\u4e0d\u5e78\u7684\u662f\uff0c\u5374\u6ca1\u6709\u533a\u5206\u51fa\u8fd9\u4e2areINVITE\u4e0e\u66f4\u6539\u5a92\u4f53\u6d41\u7684reINVITE\uff0c\u56e0\u6b64\u5b9e\u9645\u90e8\u7f72\u65f6\u662f\u5426\u6709\u6548\uff0c\u6211\u4eec\u9700\u8981\u6253\u4e00\u4e2a\u5f88\u5927\u7684\u95ee\u53f7\u3002<\/p>\n<p>\uff082\uff09\u91c7\u7528reINVITE\u6d41\u7a0b\u592a\u8fc7\u91cd\u578b\u4e86\u3002\u6b63\u5982\u524d\u9762\u6240\u8bf4\uff0ckeep-alive\u7684reINVITE\u6d88\u606f\u662f\u6ca1\u6709\u4e0e\u66f4\u6539\u5a92\u4f53\u6d41\u7684reINVITE\u8fdb\u884c\u533a\u5206\uff0c\u56e0\u6b64\u53ef\u4ee5\u80af\u5b9a\u7edd\u5927\u90e8\u5206SIP\u670d\u52a1\u5668\u6216\u8005\u7ec8\u7aef\uff0c\u5728\u6536\u5230\u8fd9\u4e2areINVITE\u6d88\u606f\u65f6\uff0c\u4f1a\u542f\u52a8\u5a92\u4f53\u66f4\u6539\u6d41\u7a0b\u3002\u5bf9\u8bdd\u5185\u91cd\u6539\u5a92\u4f53\u6beb\u65e0\u7591\u95ee\u662f\u4e2a\u5f88\u91cd\u578b\u7684\u6d41\u7a0b\uff0c\u4e00\u65e6\u5bf9\u8bdd\u5185\u672c\u8eab\u5c31\u53ef\u80fd\u6709\u5a92\u4f53\u7c7b\u4e1a\u52a1\uff0c\u4f8b\u5982Music On Hold\u7b49\uff0c\u5c31\u5f88\u6709\u53ef\u80fd\u5bfc\u81f4\u51b2\u7a81\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u91c7\u7528reINVITE\u6d88\u606f\uff0c\u57284028\u534f\u8bae\u4e2d\u4e5f\u540c\u65f6\u5efa\u8bae\u53ef\u4ee5\u91c7\u7528UPDATE\u6d88\u606f\u3002\u5728UPDATE\u6d88\u606f\u4e2d\u53ef\u4ee5\u4e0d\u643a\u5e26SDP\u66f4\u6539\u5a92\u4f53\u3002\u8fd9\u79cd\u65b9\u5f0f\u53ef\u80fd\u662f\u6bd4\u8f83\u53ef\u884c\uff0c\u4f46\u662f\u672a\u5fc5\u6240\u6709\u7684SIP\u8bbe\u5907\u4f1a\u652f\u6301UPDATE\u6d88\u606f\u5e76\u7528\u4e8ekeep-alive\u8fc7\u7a0b\u3002<\/p>\n<p>\u65b9\u6848\u4e4b\u4e8c\u5e94\u8be5\u91c7\u7528SIP\u6700\u57fa\u7840\u534f\u8baeRFC3261\u4e2d\u5b9a\u4e49\u7684OPTIONS\u6d88\u606f\u3002\u7406\u7531\u5982\u4e0b\uff1a<\/p>\n<p>\uff081\uff09\u8be5\u6d88\u606f\u5b9a\u4e49\u5728RFC3261\u534f\u8bae\u4e2d\uff0c\u8fd9\u4e2a\u534f\u8bae\u662f\u6574\u4e2aSIP\u534f\u8bae\u65cf\u7684\u57fa\u7840\u3002\u57fa\u672c\u4e0a\u4e0d\u53ef\u80fd\u6709SIP\u8bbe\u5907\uff08\u5305\u62ec\u670d\u52a1\u5668\u3001Proxy\u3001\u7ec8\u7aef\u7b49\uff09\u4f1a\u4e0d\u652f\u6301\u8fd9\u4e2a\u6d88\u606f\u3002<\/p>\n<p>\uff082\uff09\u6211\u4eec\u6ce8\u610f\u5230\uff0c\u8fd9\u4e2a\u6d88\u606f\u53ef\u4ee5\u5728\u5bf9\u8bdd\u5185\uff0c\u4e5f\u53ef\u4ee5\u5728\u5bf9\u8bdd\u5916\u4f7f\u7528\u3002\u5728RFC3261\u4e2d\u5f88\u660e\u786e\u5730\u5b9a\u4e49\u4e86\uff1a<\/p>\n<pre>An OPTIONS request received within a dialog <span style=\"color: #0000ff;\">generates a 200 (OK) response<\/span>\r\nthat is identical to one constructed outside a dialog and does not\r\nhave any impact on the dialog.<\/pre>\n<p>\uff083\uff09\u5bf9\u8bdd\u5185\u4f7f\u7528OPTIONS\uff0c\u6700\u663e\u8457\u7684\u4f18\u70b9\u5c31\u662f\u201cdoes not have any impact on the dialog\u201d\uff0c\u5bf9\u73b0\u6709\u5bf9\u8bdd\u6ca1\u6709\u4efb\u4f55\u5f71\u54cd\uff0c\u66f4\u4e0d\u53ef\u80fd\u53bb\u66f4\u6539\u5a92\u4f53\u3002<\/p>\n<p>\uff084\uff09\u5bf9\u7aef\u8bbe\u5907\u5982\u679c\u7531\u4e8e\u67d0\u79cd\u539f\u56e0\u5df2\u7ecf\u9000\u51fa\uff0c\u5f53\u7136\u5c31\u4e0d\u80fd\u4ea7\u751f200OK\u54cd\u5e94\u6d88\u606f\uff0c\u6b64\u65f6\u53ef\u4ee5\u7406\u6240\u5f53\u7136\u5730\u62c6\u9664\u5f53\u524d\u5bf9\u8bdd\uff0c\u4ece\u800c\u4fdd\u62a4\u670d\u52a1\u5668\u81ea\u8eab\u8d44\u6e90\uff0c\u8fbe\u5230keep-alive\u7684\u76ee\u7684\u3002<\/p>\n<p>\u5bf9\u4e8e\u8bbe\u5907\u5c42\u7ea7\u7684keep-alive\uff0c\u91c7\u7528OPTIONS\u6ca1\u6709\u4efb\u4f55\u95ee\u9898\u3002\u4f46\u662f\u5bf9\u4e8edialog\u5c42\u7ea7\u7684keep-alive\uff0c\u5219\u4f1a\u6709\u95ee\u9898\u3002\u539f\u56e0\u5728\u4e8e\uff1adialog\u5185\u7684OPTIONS\u6d88\u606f\u6709\u53ef\u80fd\u88ab\u5bf9\u7aef\u4f5c\u4e3a\u5bf9\u8bdd\u5916\u7684OPTIONS\u6765\u5904\u7406\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5982\u679c\u8bbe\u5907\u662falive\u7684\uff0c\u4f46\u662fdialog\u7684BYE\u6d88\u606f\u4e22\u5931\u4e86\uff0c\u65e0\u8bbadialog\u5185\u8fd8\u662fdialog\u5916\uff0c\u8bbe\u5907\u5bf9OPTIONS\u90fd\u53ef\u80fd\u4f1a\u8fd4\u56de200OK\u3002<\/p>\n<pre>Requests that do not change in any way the state of a dialog may be \r\nreceived within a dialog (for example, an OPTIONS request). \u00a0<span style=\"color: #0000ff;\">They are <\/span>\r\n<span style=\"color: #0000ff;\">processed as if they had been received outside the dialog.<\/span><\/pre>\n<p>\u65b9\u6848\u4e09\u662f\u91c7\u7528RFC5626\u534f\u8bae\uff0c\u5bf9\u4e8eUDP-SIP\u7684\u60c5\u51b5\uff0c\u8be5\u534f\u8bae\u5efa\u8bae\u91c7\u7528STUN keep-alive\u65b9\u5f0f\u3002\u7f3a\u9677\u5728\u4e8e\uff1a\u5b9a\u4e49\u6709\u4e9b\u590d\u6742\uff0c\u800c\u4e14\u5f88\u591aSIP\u8bbe\u5907\u672a\u5fc5\u4f1a\u652f\u6301\u3002<\/p>\n<p>\u547c\u53eb\u670d\u52a1\u5668\u548c\u5a92\u4f53\u670d\u52a1\u5668\u5408\u4e00\u7684\u60c5\u51b5\u4e0b\uff0c\u5f53\u7136\u4e5f\u53ef\u4ee5\u7531\u5a92\u4f53\u670d\u52a1\u5668\u68c0\u6d4bRTP\/RTCP\u6765keep-alive\uff0c\u4e0d\u8fc7\u8fd9\u662f\u53e6\u5916\u4e00\u4e2atopic\u4e86\uff0c\u8fd9\u79cd\u65b9\u5f0f\u53ef\u80fd\u66f4\u5408\u9002\u4e8eSIP\u7ec8\u7aef\u8bbe\u5907\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728SIP\u65cf\u534f\u8bae\u4e2d\uff0c\u53ea\u6709RFC4028\u660e\u786e\u8ba8\u8bba\u4e86\u5bf9\u8bddkeep-alive\u95ee\u9898\u3002\u5b9e\u9645\u4e0a\u8fd9\u5728\u5de5\u7a0b\u5e94\u7528\u3001\u751f\u4ea7\u73af\u5883\u90e8\u7f72\u4e2d\uff0c\u662f\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u8bdd\u9898\uff0c\u5c24\u5176\u662fSIP\u57fa\u4e8eUDP\u534f\u8bae\u65f6&#8230;<\/p>\n<p class=\"read-more\"><a class=\"btn btn-default\" href=\"https:\/\/www.myvoipapp.com\/blogs\/yxh\/2011\/10\/30\/rfc4028%e7%9a%84%e4%b8%8d%e8%b6%b3%e4%b8%8esip-keep-alive%e6%96%b9%e6%b3%95\/\"> Read More<span class=\"screen-reader-text\">  Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,27],"tags":[186,187,189,188,28,185],"class_list":["post-494","post","type-post","status-publish","format-standard","hentry","category-5","category-27","tag-heart-beat","tag-keep-alive","tag-options","tag-reinvite","tag-sip","tag-185"],"_links":{"self":[{"href":"https:\/\/www.myvoipapp.com\/blogs\/yxh\/wp-json\/wp\/v2\/posts\/494","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.myvoipapp.com\/blogs\/yxh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.myvoipapp.com\/blogs\/yxh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.myvoipapp.com\/blogs\/yxh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.myvoipapp.com\/blogs\/yxh\/wp-json\/wp\/v2\/comments?post=494"}],"version-history":[{"count":14,"href":"https:\/\/www.myvoipapp.com\/blogs\/yxh\/wp-json\/wp\/v2\/posts\/494\/revisions"}],"predecessor-version":[{"id":1874,"href":"https:\/\/www.myvoipapp.com\/blogs\/yxh\/wp-json\/wp\/v2\/posts\/494\/revisions\/1874"}],"wp:attachment":[{"href":"https:\/\/www.myvoipapp.com\/blogs\/yxh\/wp-json\/wp\/v2\/media?parent=494"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.myvoipapp.com\/blogs\/yxh\/wp-json\/wp\/v2\/categories?post=494"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.myvoipapp.com\/blogs\/yxh\/wp-json\/wp\/v2\/tags?post=494"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}